Appendix J PR 69 (IR-33049)

This project was bid as a design build contract. INDOT let this project on mainline as an optional pavement section (HMA or PCCP) or the Contractor's alternate pavement section. INDOT received five (5) bids (5 PCCP options, 3 HMA options, and 2 Contractor's alternate pavement section) and all bids were substantially below the engineer's estimate. One (1) Contractor participated in both HMA and PCCP pavement type options and two (2) Contractors participated in all three: HMA, PCCP, and the alternate pavement section.

INDOT provided the following pavement design thickness for this project:

PR 69 mainline

11 inches of PCCP or

13 inches of HMA

SR 58 ramps

9 inches of PCCP or

10 inches of HMA

The Contractor's alternate pavement sections for mainline of this project were as follow:

13 inches of HMA with a modified subgrade treatment.

11 inches of PCCP mainline and inside shoulder.

Bid Analysis Summary

PCCP Option

Bidders

Initial Bid

PW Cost for PCCP

Bid Analysis

A

$58,527,869.00

+

$1,724,911.00

=

$60,252,780.00

B

$59,806,080.00

+

$1,724,911.00

=

$61,530,991.00

C

$61,311,094.52

+

$1,724,911.00

=

$63,036,005.52

D

$62,230,560.00

+

$1,724,911.00

=

$63,955,471.00

E

$65,171,050.00

+

$1,724,911.00

=

$66,895,961.00

HMA Option

Bidders

Initial Bid

PW Cost for HMA

Bid Analysis

C

$61,494,275.52

+

$2,793,699.00

=

$64,287,974.52

D

$61,830,560.00

+

$2,793,699.00

=

$64,624,259.00

E

$65,798,918.00

+

$2,793,699.00

=

$68,592,617.00

Contractor's Alternate HMA Pavement

Bidders

Initial Bid

PW Cost for Alt. HMA

Bid Analysis

E

$64,847,287.00

+

$2,793,699.00

=

$67,640,986.00

Contractor's Alternate PCCP Pavement

Bidders

Initial Bid

PW Cost for Alt. PCCP

Bid Analysis

C

$61,072,476.52

+

$1,753,859.00

=

$62,826,335.52

The low bid amount, out of all 5 bids, was for PCCP option (Bidder A) and after adding PW cost of HMA, PCCP, and Contractor's Alternate HMA and PCCP section to the respective pavement type, PCCP option was the low bid (Bidder A). PCCP option of Bidder A was awarded for this contract. The PW cost factor did not affected the outcome of the bidding.

INDOT is unable to compared the estimated cost of pavement pay items with actual low bid costs of all three pavement types since this contract was not let as an itemized proposal. All other pavement types such as S-lines in the bids were common to all pavement options.

Conclusion

INDOT saved the tax payers approximately $2,945,856.52 immediately, at the bid opening, (HMA Low Bid – PCCP Low Bid). Using the Bid Analysis amounts (after PW costs applied); INDOT saved the tax payers approximately $4,014,644.52 over the 50 year service life of the pavement. These savings include the reduction of INDOT's consultant cost of $20,550.00 for producing two sets of typical plan sheets and quantities. The inhouse costs for INDOT were determined negligible.

The PW cost for future maintenance did not impact the bids and which contractor received the contract. INDOT believes using this process of alternate bids for pavement type selection on this project was very successful.

PW of Future Maintenance of the Pavement I-69 (IR-33049)

Optional Pavement Section (INDOT)

PW of HMA Section = $2,793,699.00

PW of PCCP Section = $1,724,911.00

PCCP Alternate Pavement Section (Contractor)

PW of Alternate Pavement Type (PCCP) = $1,753,859.00

HMA Alternate Pavement Section (Contractor)

PW of Alternate Pavement Type (HMA) = $2,793,699.00

HMA PW for Future Rehabilitation Work (INDOT)

Age in Years

Rehab.

Cost $

Present Worth Cost $

3

Joint Seal

150,817.00

$134,075.76

6

Joint Seal

150,817.00

$119,192.87

9

Joint Seal

150,817.00

$105,962.02

12

Joint Seal

150,817.00

$94,199.85

15

Joint Seal

150,817.00

$83,743.33

18

Joint Seal

150,817.00

$74,447.51

20

Mill and Functional Overlay

3,225,836.00

$1,472,229.44

23

Joint Seal

150,817.00

$61,190.43

26

Joint Seal

150,817.00

$54,398.07

29

Joint Seal

150,817.00

$48,359.68

32

Joint Seal

150,817.00

$42,991.58

35

Mill and Resurface

1,531,091.00

$388,002.15

38

Joint Seal

150,817.00

$33,976.87

41

Joint Seal

150,817.00

$30,205.32

44

Joint Seal

150,817.00

$26,852.42

47

Joint Seal

150,817.00

$23,871.70

Total HMA PW Cost $2,793,699.00

PCCP PW for Future Rehabilitation Work (INDOT)

Age in Years

Rehab.

Cost $

Present Worth Cost $

8

Reseal the Joint

157,861.00

$115,347.49

16

Reseal the Joint

157,861.00

$84,283.28

24

Reseal the Joint

157,861.00

$61,584.97

30

Mill and Functional Overlay

3,251,932.00

$1,002,631.34

33

Joint Seal

150,817.00

$41,338.06

36

Joint Seal

150,817.00

$36,749.39

39

Joint Seal

150,817.00

$32,670.07

42

Mill and Resurface

1,565,798.00

$301,533.44

45

Joint Seal

150,817.00

$25,819.63

48

Joint Seal

150,817.00

$22,953.56

Total PCCP PW Cost $1,724,911.22

PW = F [1/(1+i)n]

Where: F = Future Construction Cost
i = Discount rate (4%)
n = Number of years from year zero

PCCP PW for Future Rehabilitation Work (Contractor)

Age in Years

Rehab.

Cost $

Present Worth Cost $

8

Reseal the Joint

178,134.00

$130,160.77

16

Reseal the Joint

178,134.00

$95,107.20

24

Reseal the Joint

178,134.00

$69,493.90

30

Mill and Functional Overlay

3,237,018.00

$998,033.08

33

Joint Seal

150,817.00

$41,338.06

36

Joint Seal

150,817.00

$36,749.39

39

Joint Seal

150,817.00

$32,670.07

42

Mill and Resurface

1,565,798.00

$301,533.44

45

Joint Seal

150,817.00

$25,819.63

48

Joint Seal

150,817.00

$22,953.56

Total PCCP PW Cost $1,753,859.09

PW = F [1/(1+i)n]

Where: F = Future Construction Cost
i = Discount rate (4%)
n = Number of years from year zero

HMA PW for Future Rehabilitation Work (Contractor)

Age in Years

Rehab.

Cost $

Present Worth Cost $

3

Joint Seal

150,817.00

$134,075.76

6

Joint Seal

150,817.00

$119,192.87

9

Joint Seal

150,817.00

$105,962.02

12

Joint Seal

150,817.00

$94,199.85

15

Joint Seal

150,817.00

$83,743.33

18

Joint Seal

150,817.00

$74,447.51

20

Mill and Functional Overlay

3,225,836.00

$1,472,229.44

23

Joint Seal

150,817.00

$61,190.43

26

Joint Seal

150,817.00

$54,398.07

29

Joint Seal

150,817.00

$48,359.68

32

Joint Seal

150,817.00

$42,991.58

35

Mill and Resurface

1,531,091.00

$388,002.15

38

Joint Seal

150,817.00

$33,976.87

41

Joint Seal

150,817.00

$30,205.32

44

Joint Seal

150,817.00

$26,852.42

47

Joint Seal

150,817.00

$23,871.70

Total HMA PW Cost $2,793,699.00

PW = F [1/(1+i)n]

Where: F = Future Construction Cost
i = Discount rate (4%)
n = Number of years from year zero